mirror of
https://git.FreeBSD.org/src.git
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44956c9863
Merge M_NOWAIT/M_DONTWAIT into a single flag M_NOWAIT.
484 lines
11 KiB
C
484 lines
11 KiB
C
/*
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* Copyright (c) 2000-2001, Boris Popov
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Boris Popov.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/iconv.h>
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#include <sys/malloc.h>
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#include "iconv_converter_if.h"
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SYSCTL_DECL(_kern_iconv);
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SYSCTL_NODE(_kern, OID_AUTO, iconv, CTLFLAG_RW, NULL, "kernel iconv interface");
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MALLOC_DEFINE(M_ICONV, "ICONV", "ICONV structures");
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MALLOC_DEFINE(M_ICONVDATA, "ICONV data", "ICONV data");
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MODULE_VERSION(libiconv, 1);
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#ifdef notnow
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/*
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* iconv converter instance
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*/
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struct iconv_converter {
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KOBJ_FIELDS;
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void * c_data;
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};
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#endif
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struct sysctl_oid *iconv_oid_hook = &sysctl___kern_iconv;
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/*
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* List of loaded converters
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*/
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static TAILQ_HEAD(iconv_converter_list, iconv_converter_class)
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iconv_converters = TAILQ_HEAD_INITIALIZER(iconv_converters);
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/*
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* List of supported/loaded charsets pairs
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*/
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static TAILQ_HEAD(, iconv_cspair)
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iconv_cslist = TAILQ_HEAD_INITIALIZER(iconv_cslist);
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static int iconv_csid = 1;
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static char iconv_unicode_string[] = "unicode"; /* save eight bytes when possible */
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static void iconv_unregister_cspair(struct iconv_cspair *csp);
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static int
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iconv_mod_unload(void)
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{
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struct iconv_cspair *csp;
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while ((csp = TAILQ_FIRST(&iconv_cslist)) != NULL) {
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if (csp->cp_refcount)
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return EBUSY;
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iconv_unregister_cspair(csp);
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}
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return 0;
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}
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static int
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iconv_mod_handler(module_t mod, int type, void *data)
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{
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int error;
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switch (type) {
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case MOD_LOAD:
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error = 0;
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break;
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case MOD_UNLOAD:
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error = iconv_mod_unload();
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break;
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default:
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error = EINVAL;
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}
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return error;
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}
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static moduledata_t iconv_mod = {
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"iconv", iconv_mod_handler, NULL
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};
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DECLARE_MODULE(iconv, iconv_mod, SI_SUB_DRIVERS, SI_ORDER_SECOND);
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static int
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iconv_register_converter(struct iconv_converter_class *dcp)
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{
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kobj_class_compile((struct kobj_class*)dcp);
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dcp->refs++;
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TAILQ_INSERT_TAIL(&iconv_converters, dcp, cc_link);
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return 0;
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}
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static int
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iconv_unregister_converter(struct iconv_converter_class *dcp)
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{
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if (dcp->refs > 1) {
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ICDEBUG("converter have %d referenses left\n", dcp->refs);
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return EBUSY;
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}
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TAILQ_REMOVE(&iconv_converters, dcp, cc_link);
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kobj_class_free((struct kobj_class*)dcp);
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return 0;
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}
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static int
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iconv_lookupconv(const char *name, struct iconv_converter_class **dcpp)
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{
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struct iconv_converter_class *dcp;
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TAILQ_FOREACH(dcp, &iconv_converters, cc_link) {
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if (name == NULL)
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continue;
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if (strcmp(name, ICONV_CONVERTER_NAME(dcp)) == 0) {
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if (dcpp)
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*dcpp = dcp;
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return 0;
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}
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}
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return ENOENT;
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}
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static int
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iconv_lookupcs(const char *to, const char *from, struct iconv_cspair **cspp)
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{
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struct iconv_cspair *csp;
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TAILQ_FOREACH(csp, &iconv_cslist, cp_link) {
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if (strcmp(csp->cp_to, to) == 0 &&
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strcmp(csp->cp_from, from) == 0) {
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if (cspp)
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*cspp = csp;
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return 0;
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}
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}
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return ENOENT;
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}
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static int
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iconv_register_cspair(const char *to, const char *from,
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struct iconv_converter_class *dcp, void *data,
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struct iconv_cspair **cspp)
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{
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struct iconv_cspair *csp;
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char *cp;
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int csize, ucsto, ucsfrom;
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if (iconv_lookupcs(to, from, NULL) == 0)
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return EEXIST;
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csize = sizeof(*csp);
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ucsto = strcmp(to, iconv_unicode_string) == 0;
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if (!ucsto)
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csize += strlen(to) + 1;
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ucsfrom = strcmp(from, iconv_unicode_string) == 0;
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if (!ucsfrom)
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csize += strlen(from) + 1;
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csp = malloc(csize, M_ICONV, 0);
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bzero(csp, csize);
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csp->cp_id = iconv_csid++;
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csp->cp_dcp = dcp;
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cp = (char*)(csp + 1);
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if (!ucsto) {
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strcpy(cp, to);
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csp->cp_to = cp;
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cp += strlen(cp) + 1;
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} else
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csp->cp_to = iconv_unicode_string;
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if (!ucsfrom) {
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strcpy(cp, from);
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csp->cp_from = cp;
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} else
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csp->cp_from = iconv_unicode_string;
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csp->cp_data = data;
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TAILQ_INSERT_TAIL(&iconv_cslist, csp, cp_link);
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*cspp = csp;
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return 0;
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}
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static void
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iconv_unregister_cspair(struct iconv_cspair *csp)
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{
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TAILQ_REMOVE(&iconv_cslist, csp, cp_link);
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if (csp->cp_data)
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free(csp->cp_data, M_ICONVDATA);
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free(csp, M_ICONV);
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}
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/*
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* Lookup and create an instance of converter.
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* Currently this layer didn't have associated 'instance' structure
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* to avoid unnesessary memory allocation.
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*/
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int
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iconv_open(const char *to, const char *from, void **handle)
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{
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struct iconv_cspair *csp, *cspfrom, *cspto;
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struct iconv_converter_class *dcp;
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const char *cnvname;
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int error;
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/*
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* First, lookup fully qualified cspairs
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*/
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error = iconv_lookupcs(to, from, &csp);
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if (error == 0)
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return ICONV_CONVERTER_OPEN(csp->cp_dcp, csp, NULL, handle);
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/*
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* Well, nothing found. Now try to construct a composite conversion
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* ToDo: add a 'capability' field to converter
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*/
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TAILQ_FOREACH(dcp, &iconv_converters, cc_link) {
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cnvname = ICONV_CONVERTER_NAME(dcp);
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if (cnvname == NULL)
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continue;
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error = iconv_lookupcs(cnvname, from, &cspfrom);
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if (error)
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continue;
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error = iconv_lookupcs(to, cnvname, &cspto);
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if (error)
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continue;
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/*
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* Fine, we're found a pair which can be combined together
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*/
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return ICONV_CONVERTER_OPEN(dcp, cspto, cspfrom, handle);
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}
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return ENOENT;
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}
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int
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iconv_close(void *handle)
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{
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return ICONV_CONVERTER_CLOSE(handle);
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}
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int
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iconv_conv(void *handle, const char **inbuf,
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size_t *inbytesleft, char **outbuf, size_t *outbytesleft)
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{
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return ICONV_CONVERTER_CONV(handle, inbuf, inbytesleft, outbuf, outbytesleft);
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}
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/*
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* Give a list of loaded converters. Each name terminated with 0.
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* An empty string terminates the list.
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*/
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static int
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iconv_sysctl_drvlist(SYSCTL_HANDLER_ARGS)
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{
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struct iconv_converter_class *dcp;
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const char *name;
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char spc;
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int error;
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error = 0;
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TAILQ_FOREACH(dcp, &iconv_converters, cc_link) {
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name = ICONV_CONVERTER_NAME(dcp);
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if (name == NULL)
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continue;
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error = SYSCTL_OUT(req, name, strlen(name) + 1);
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if (error)
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break;
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}
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if (error)
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return error;
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spc = 0;
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error = SYSCTL_OUT(req, &spc, sizeof(spc));
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return error;
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}
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SYSCTL_PROC(_kern_iconv, OID_AUTO, drvlist, CTLFLAG_RD | CTLTYPE_OPAQUE,
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NULL, 0, iconv_sysctl_drvlist, "S,xlat", "registered converters");
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/*
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* List all available charset pairs.
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*/
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static int
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iconv_sysctl_cslist(SYSCTL_HANDLER_ARGS)
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{
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struct iconv_cspair *csp;
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struct iconv_cspair_info csi;
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int error;
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error = 0;
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bzero(&csi, sizeof(csi));
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csi.cs_version = ICONV_CSPAIR_INFO_VER;
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TAILQ_FOREACH(csp, &iconv_cslist, cp_link) {
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csi.cs_id = csp->cp_id;
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csi.cs_refcount = csp->cp_refcount;
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csi.cs_base = csp->cp_base ? csp->cp_base->cp_id : 0;
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strcpy(csi.cs_to, csp->cp_to);
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strcpy(csi.cs_from, csp->cp_from);
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error = SYSCTL_OUT(req, &csi, sizeof(csi));
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if (error)
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break;
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}
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return error;
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}
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SYSCTL_PROC(_kern_iconv, OID_AUTO, cslist, CTLFLAG_RD | CTLTYPE_OPAQUE,
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NULL, 0, iconv_sysctl_cslist, "S,xlat", "registered charset pairs");
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/*
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* Add new charset pair
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*/
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static int
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iconv_sysctl_add(SYSCTL_HANDLER_ARGS)
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{
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struct iconv_converter_class *dcp;
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struct iconv_cspair *csp;
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struct iconv_add_in din;
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struct iconv_add_out dout;
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int error;
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error = SYSCTL_IN(req, &din, sizeof(din));
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if (error)
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return error;
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if (din.ia_version != ICONV_ADD_VER)
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return EINVAL;
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if (din.ia_datalen > ICONV_CSMAXDATALEN)
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return EINVAL;
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if (iconv_lookupconv(din.ia_converter, &dcp) != 0)
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return EINVAL;
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error = iconv_register_cspair(din.ia_to, din.ia_from, dcp, NULL, &csp);
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if (error)
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return error;
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if (din.ia_datalen) {
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csp->cp_data = malloc(din.ia_datalen, M_ICONVDATA, 0);
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error = copyin(din.ia_data, csp->cp_data, din.ia_datalen);
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if (error)
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goto bad;
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}
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dout.ia_csid = csp->cp_id;
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error = SYSCTL_OUT(req, &dout, sizeof(dout));
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if (error)
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goto bad;
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return 0;
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bad:
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iconv_unregister_cspair(csp);
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return error;
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}
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SYSCTL_PROC(_kern_iconv, OID_AUTO, add, CTLFLAG_RW | CTLTYPE_OPAQUE,
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NULL, 0, iconv_sysctl_add, "S,xlat", "register charset pair");
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/*
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* Default stubs for converters
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*/
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int
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iconv_converter_initstub(struct iconv_converter_class *dp)
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{
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return 0;
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}
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int
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iconv_converter_donestub(struct iconv_converter_class *dp)
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{
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return 0;
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}
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int
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iconv_converter_handler(module_t mod, int type, void *data)
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{
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struct iconv_converter_class *dcp = data;
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int error;
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switch (type) {
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case MOD_LOAD:
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error = iconv_register_converter(dcp);
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if (error)
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break;
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error = ICONV_CONVERTER_INIT(dcp);
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if (error)
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iconv_unregister_converter(dcp);
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break;
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case MOD_UNLOAD:
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ICONV_CONVERTER_DONE(dcp);
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error = iconv_unregister_converter(dcp);
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break;
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default:
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error = EINVAL;
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}
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return error;
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}
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/*
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* Common used functions
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*/
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char *
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iconv_convstr(void *handle, char *dst, const char *src)
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{
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char *p = dst;
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size_t inlen, outlen;
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int error;
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if (handle == NULL) {
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strcpy(dst, src);
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return dst;
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}
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inlen = outlen = strlen(src);
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error = iconv_conv(handle, NULL, NULL, &p, &outlen);
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if (error)
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return NULL;
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error = iconv_conv(handle, &src, &inlen, &p, &outlen);
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if (error)
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return NULL;
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*p = 0;
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return dst;
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}
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void *
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iconv_convmem(void *handle, void *dst, const void *src, int size)
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{
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const char *s = src;
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char *d = dst;
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size_t inlen, outlen;
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int error;
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if (size == 0)
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return dst;
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if (handle == NULL) {
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memcpy(dst, src, size);
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return dst;
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}
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inlen = outlen = size;
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error = iconv_conv(handle, NULL, NULL, &d, &outlen);
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if (error)
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return NULL;
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error = iconv_conv(handle, &s, &inlen, &d, &outlen);
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if (error)
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return NULL;
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return dst;
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}
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int
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iconv_lookupcp(char **cpp, const char *s)
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{
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if (cpp == NULL) {
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ICDEBUG("warning a NULL list passed\n", ""); /* XXX ISO variadic macros cannot
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leave out the
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variadic args */
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return ENOENT;
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}
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for (; *cpp; cpp++)
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if (strcmp(*cpp, s) == 0)
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return 0;
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return ENOENT;
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}
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